Follow these simple steps to create your Refreshing Tropical Mango Curd Tart:

1. Preheat Oven: Preheat your oven to 350°F (175°C).

2. Make the Tart Shell: In a mixing bowl, combine the flour and powdered sugar. Add the softened butter and mix until crumbly.

3. Add Egg Yolk: Stir in the egg yolk and cold water until the mixture forms a dough. Press the dough into a tart pan evenly.

4. Blind Bake: Place parchment paper over the crust and fill it with pie weights. Bake for 15 minutes, then remove the weights and bake for another 10 minutes until lightly golden. Let it cool.

5. Prepare Mango Curd: In a saucepan, combine mango puree, sugar, eggs, lime juice, and salt. Cook over medium heat, stirring continuously until the mixture thickens (about 10 minutes).

6. Add Butter: Remove from heat and stir in the butter and vanilla extract until smooth.

7. Fill Tart Shell: Pour the mango curd into the cooled tart shell and spread it evenly.

8. Chill: Refrigerate the tart for at least 45 minutes to set.

9. Garnish: Optionally, top with whipped cream or fresh mango slices before serving.

10. Serve: Slice and enjoy your refreshing tart!